|Year|Champion|Score|Runner-Up|Total Prize Money|Champion|Runner-Up|
|---|---|---|---|---|---|---|
|2001|Ravi Sandiran|?-?|Thanawat Gaweenuntavong|?|?|?|
|2005|Tengku Hadzali Shah|?-?|Mohd Nazib Khalit|?|?|?|
|2006|Selbaraju Subramaniam|?-?|Tengku Hadzali Shah|?|?|?|
|2007|S Raj|?-?|Keshminder Singh|SGD 3,600|SGD 1,600|SGD 800|
|2008|Robert Calupit|?-?|Shah Azhar|SGD 3,600|SGD 1,600|SGD 800|
|2009|Ronald L Briones|?-?|Tengku Hadzali Shah|SGD 2,400|SGD 1,000|SGD 500|
|2010|?|?-?|?|?|SGD 1,000|SGD 500|

Question: how many known champions have their been for the open?
Answer: 6